A Regime, Not an Event
Most scenarios we track are events with a trigger. [Fiscal dominance](/glossary/fiscal-dominance) is different: it is a slow change in who sets the long end of the curve. The thesis is that with US debt-to-[GDP](/glossary/gdp) at its highest since the second world war, near 125%, and deficits running around 6% of [GDP](/metrics/gdp), the Treasury's financing needs eventually force [the Fed](/glossary/fomc) to cap [real rates](/metrics/dfii10) implicitly, even at the cost of higher [inflation](/glossary/cpi). When that happens, long-end yields stop taking their cue from [Fed guidance](/glossary/forward-guidance) and start taking it from supply.
The Evidence Is Accumulating Quietly
There is no single print that confirms [fiscal dominance](/glossary/fiscal-dominance). Instead there is a pattern: the 10-year [yield](/glossary/dividend-yield) sitting near 4.40% with a [real yield](/glossary/real-yield) at 2.16% that is high by post-2010 standards, persistent term-premium pressure, and heavy Treasury issuance that the market must absorb without [the Fed](/glossary/fomc) as a reliable backstop. None of that is a crisis today. But each is a small piece of the same structural story, and the direction of travel is one way.
The Historical Rhyme
The last time the US ran debt at this share of output, in the 1940s, the Federal Reserve explicitly capped Treasury yields to help finance the war and its aftermath, holding long-term rates down while [inflation](/metrics/cpiaucsl) ran hot and eroded the [real value](/glossary/intrinsic-value-investing) of the debt. That episode, [financial repression](/glossary/financial-repression), is the template [for](/metrics/fodsp) fiscal dominance: the central bank's [balance sheet](/glossary/balance-sheet) becomes an instrument of debt management rather than pure [inflation](/glossary/cpi) control. Nobody expects an explicit [yield](/glossary/dividend-yield) cap today. But the softer version, a Fed that tolerates above-target [inflation](/metrics/cpiaucsl) because the alternative is a debt-servicing squeeze, does not require an announcement. It shows up first in the [term premium](/glossary/term-premium), in the willingness of the long end to detach from the [policy rate](/glossary/fed-funds-rate). That detachment is the single signal that would tell us the regime has arrived, and it is exactly what we are watching [for](/metrics/fodsp).
Scenario probabilities are computed using a Bayesian log-odds model with calibrated base rates, z-score evidence weighting on first-differences, cross-metric correlation adjustment, and simultaneous coherence enforcement. Positioning reflects directional expected value under binary resolution assumptions. Full methodology and known limitations →